Model selection of explosion-proof electric valves
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2018-10-07
The model of explosion-proof electric valve is selected from Yixing Xuyang Environmental Protection Factory ① Clarify the purpose of the valve in the equipment or device, determine the working conditions of the valve: applicable medium, working pressure, working temperature, etc ② Determine the nominal diameter and connection method of the pipeline connected to the valve: flange, thread, welding, etc ③ Determine the method of operating the valve: manual, electric, electromagnetic, pneumatic or hydraulic, electrical or electro-hydraulic linkage, etc ④ Based on the medium conveyed by the pipeline, working pressure, and working temperature, determine the materials of the selected valve casing and internal components: gray cast iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless acid resistant steel, copper alloy, etc ⑤ Choose the type of valve: closed circuit valve, regulating valve, safety valve, etc ⑥ Determine the type of valve: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap valve, etc ⑦ Determine the parameters of the valve: For automatic valves, determine the allowable flow resistance, discharge capacity, back pressure, etc. according to different needs, and then determine the nominal diameter of the pipeline and the diameter of the valve seat hole ⑧ Determine the geometric parameters of the selected valve: structural length, flange connection form and size, dimensions in the height direction of the valve after opening and closing, size and quantity of connecting bolt holes, overall valve dimensions, etc
